<template>
  <div class="login-container">
    <!-- 导航栏 -->
    <van-nav-bar class="page-nav-bar" title="登录">
      <template #left>
        <van-icon name="cross" @click="$router.back()" />
      </template>
    </van-nav-bar>
    <!-- /导航栏 -->

    <!-- 表单验证
    1. 给 van-field 组件配置 rules 验证规则
    2. 当表单提交的时候会自动触发表单验证
      如果验证通过，会触发 submit 事件
      如果验证失败，不会触发 submit
     -->
    <van-form @submit="onSubmit" ref="loginForm">
      <van-field
        v-model="user.mobile"
        name="mobile"
        placeholder="请输入手机号"
        :rules="userFormRules.mobile"
        type="number"
        maxlength="11"
      >
        <i slot="left-icon" class="toutiao toutiao-shouji"></i>
      </van-field>
      <van-field
        v-model="user.code"
        name="code"
        placeholder="请输入验证码"
        :rules="userFormRules.code"
        type="number"
        maxlength="6"
      >
        <i slot="left-icon" class="toutiao toutiao-yanzhengma"></i>
        <template #button>
          <!-- time: 倒计时时间 -->
          <van-count-down
            :time="1000 * 60"
            format="ss s"
            v-if="isCountDownShow"
            @finish="this.isCountDownShow = false"
          />
          <van-button
            v-else
            class="send-sms-btn"
            size="small"
            round
            type="default"
            @click="onSendSms"
            native-type="button"
            >获取验证码</van-button
          >
        </template>
      </van-field>
      <div class="login-btn-wrap">
        <van-button block type="info" native-type="submit">登录</van-button>
      </div>
    </van-form>
  </div>
</template>

<script>
import { login, sendSms } from '@/api/user';

export default {
  name: 'LoginPage',
  components: {},
  props: {},
  data() {
    return {
      user: {
        mobile: '18373038662', // 手机号
        code: '246810', // 验证码
      },
      userFormRules: {
        mobile: [
          { required: true, message: '手机号不能为空' },
          { pattern: /1[3|5|7|8]\d{9}/, message: '手机号格式错误' },
        ],
        code: [
          { required: true, message: '请输入正确内容' },
          { pattern: /\d{6}/, message: '验证码格式错误' },
        ],
      },
      isCountDownShow: false, // 是否展示倒计时
    };
  },
  computed: {},
  watch: {},
  created() {},
  mounted() {},
  methods: {
    async onSubmit() {
      // 1.获取表单数据
      const user = this.user;
      // 2. 表单验证

      // 在组件中必须通过 this.$toast 来调用 Toast 组件
      this.$toast.loading({
        message: '登录中...',
        forbidClick: true, // 禁用背景点击
        duration: 0, // 持续时间，默认是2000, 如果为 0 则持续展示
      });
      // 3. 提交表单请求代理
      try {
        const { data } = await login(user);
        this.$store.commit('setUser', data.data);
        this.$toast.success('登录成功');
        this.$router.back();
      } catch (err) {
        if (err.response.status === 400) {
          this.$toast.fail('手机号或验证码错误');
        } else {
          this.$toast.fail('登录失败');
        }
      }
      // 4. 根据请求响应结果处理后续操作
    },
    async onSendSms() {
      // 1. 校验手机号
      try {
        await this.$refs.loginForm.validate('mobile');
      } catch (err) {
        return this.$toast.fail('验证失败', err);
      }
      // 2. 验证通过，显示倒计时
      this.isCountDownShow = true;

      // 3. 请求发送验证码
      try {
        await sendSms(this.user.mobile);
        this.$toast.success('发送成功');
      } catch (err) {
        // 发送失败
        this.isCountDownShow = false;
        if (err.response.status === 429) {
          this.$toast.fail('发送太频繁了，请稍后重试');
        } else {
          this.$toast.fail('发送失败，请稍后重试');
        }
      }
    },
  },
};
</script>

<style scoped lang="less">
.login-container {
  .toutiao {
    font-size: 37px;
  }
  .send-sms-btn {
    width: 152px;
    height: 46px;
    line-height: 46px;
    background-color: #ededed;
    font-size: 22px;
    color: #666;
  }
  .login-btn-wrap {
    padding: 53px 33px;
    .login-btn {
      background-color: #6db4fb;
      border: none;
    }
  }
}
</style>
